Physics-
General
Easy

Question

A reversible engine converts one-sixth of the heat in put in to work. When the temperature of the sink is reduced by 62degreeC,the efficiency of the engine is doubled. The temperatures of the source and sink are

  1. 99degreeC,37degreeC    
  2. 80degreeC,37degreeC    
  3. 95degreec,37degreeC    
  4. 90degreeC,37degreeC    

The correct answer is: 99degreeC,37degreeC


    Related Questions to study

    General
    Physics-

    Four curves A,B,C  and D are drawn in the figure for a given amount of a gas. The curve which  represent adiabatic and isothermal changes are

    Four curves A,B,C  and D are drawn in the figure for a given amount of a gas. The curve which  represent adiabatic and isothermal changes are

    Physics-General
    General
    Physics-

    5.6 litre of helium gas at SIP is adiabatically compressed to 0.7 litre. Taking the in initial temperature to be T1,the work done in the process is

    5.6 litre of helium gas at SIP is adiabatically compressed to 0.7 litre. Taking the in initial temperature to be T1,the work done in the process is

    Physics-General
    General
    Physics-

    In a Carnot engine, the temperature of reservoir is 927degreeCand that of sink is 27degreeC. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 cross times 106J,the quantity of heat absorbed by the engine from the reservoir is

    In a Carnot engine, the temperature of reservoir is 927degreeCand that of sink is 27degreeC. If the work done by the engine when it transfers heat from reservoir to sink is 12.6 cross times 106J,the quantity of heat absorbed by the engine from the reservoir is

    Physics-General
    parallel
    General
    Physics-

    A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is

    A diatomic ideal gas is compressed adiabatically to 1/32 of its initial volume. If the initial temperature of the gas isT1(in Kelvin) and the final temperature is aT1,the value of a is

    Physics-General
    General
    Physics-

    The specific heat capacity of a metal at low temperature(7) is given asC open parentheses k J K to the power of negative 1 end exponent k g to the power of negative 1 end exponent close parentheses equals 32 open parentheses fraction numerator T over denominator 400 end fraction close parentheses to the power of 3 end exponentA 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27degreeC). The amount of work required to cool in vessel is

    The specific heat capacity of a metal at low temperature(7) is given asC open parentheses k J K to the power of negative 1 end exponent k g to the power of negative 1 end exponent close parentheses equals 32 open parentheses fraction numerator T over denominator 400 end fraction close parentheses to the power of 3 end exponentA 100g vessel of this metal is to be cooled from 20 K to 4 K by a special refrigerator operating at room temperature(27degreeC). The amount of work required to cool in vessel is

    Physics-General
    General
    Physics-

    Consider a spherical shell of radius R at temperature T. The black body radiation in side it can be considered as an ideal gas of photons with internal energy per unit volume u=fraction numerator sigma over denominator V end fraction proportional to T to the power of 4 end exponentand pressure p equals fraction numerator 1 over denominator 3 end fraction open parentheses fraction numerator U over denominator V end fraction close parentheses If the shell now undergoes an adiabatic expansion the relation between T and R is:

    Consider a spherical shell of radius R at temperature T. The black body radiation in side it can be considered as an ideal gas of photons with internal energy per unit volume u=fraction numerator sigma over denominator V end fraction proportional to T to the power of 4 end exponentand pressure p equals fraction numerator 1 over denominator 3 end fraction open parentheses fraction numerator U over denominator V end fraction close parentheses If the shell now undergoes an adiabatic expansion the relation between T and R is:

    Physics-General
    parallel
    General
    General

    Which of the following is the unit for centrifugal force?

    Which of the following is the unit for centrifugal force?

    GeneralGeneral
    General
    Maths-

    If the sides of a triangle ABC are a, b and c such that 2b = a + c,blankthen exhaustive range of fraction numerator b over denominator c end fraction is

    If the sides of a triangle ABC are a, b and c such that 2b = a + c,blankthen exhaustive range of fraction numerator b over denominator c end fraction is

    Maths-General
    General
    Physics-

    Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
    Reason : According to classical physics all moving electrons radiate.

    Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
    Reason : According to classical physics all moving electrons radiate.

    Physics-General
    parallel
    General
    Chemistry-

    The centre of the Sun consists of gases whose average molecular weight is 2. If the density of the gases is 2.73 cross times 10 cubed kg divided by straight m cubed at a pressure of 1.12 cross times 10 to the power of 9 atm, the temperature at the centre of the sun is (assuming ideal behavior)

    The centre of the Sun consists of gases whose average molecular weight is 2. If the density of the gases is 2.73 cross times 10 cubed kg divided by straight m cubed at a pressure of 1.12 cross times 10 to the power of 9 atm, the temperature at the centre of the sun is (assuming ideal behavior)

    Chemistry-General
    General
    Chemistry-

    What is the numerical value of gas constant R, in lit text  atm  end text mol to the power of negative 1 end exponent straight K to the power of negative 1 end exponent?

    What is the numerical value of gas constant R, in lit text  atm  end text mol to the power of negative 1 end exponent straight K to the power of negative 1 end exponent?

    Chemistry-General
    General
    Chemistry-

    At 0°C and a pressure of 2 atmospheres volume of 1 gram of a diatomic gaseous element is 350ml. Weight of 1 atom of the element in grams is

    At 0°C and a pressure of 2 atmospheres volume of 1 gram of a diatomic gaseous element is 350ml. Weight of 1 atom of the element in grams is

    Chemistry-General
    parallel
    General
    Chemistry-

    Oxygen is present in a flask of 1.12L capacity at a pressure of 7.6 cross times 10 to the power of negative 10 end exponent mm of Hg at O°C. The number of oxygen molecules in the flask is

    Oxygen is present in a flask of 1.12L capacity at a pressure of 7.6 cross times 10 to the power of negative 10 end exponent mm of Hg at O°C. The number of oxygen molecules in the flask is

    Chemistry-General
    General
    Chemistry-

    The average speed at straight T subscript 1K and most probable speed at straight T subscript 2K of CO subscript 2 gas is 9 cross times 10 to the power of 44 cm/sec. The values of straight T subscript 1 and straight T subscript 2 are

    The average speed at straight T subscript 1K and most probable speed at straight T subscript 2K of CO subscript 2 gas is 9 cross times 10 to the power of 44 cm/sec. The values of straight T subscript 1 and straight T subscript 2 are

    Chemistry-General
    General
    Chemistry-

    The RMS velocity of a gas is 3.5 cross times 10 to the power of 4 cm/sec The most probable velocity of the molecules is

    The RMS velocity of a gas is 3.5 cross times 10 to the power of 4 cm/sec The most probable velocity of the molecules is

    Chemistry-General
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.